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Do not update killers in qsearch

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It seems totally unuseful because killers are not
used to order the moves in qsearch. Although there
is some functionality change, probably just a small
side effect.

After 5656 games on rc
Mod vs Orig: 1007 - 980 - 3669  ELO +1 (+- 3.7)

Signed-off-by: Marco Costalba <mcostalba@gmail.com>
This commit is contained in:
Marco Costalba 2010-09-14 10:39:12 +02:00
parent 9d1522b24f
commit c1558dde12
1 changed files with 0 additions and 5 deletions
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5
src/search.cpp
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@ -1544,11 +1544,6 @@ namespace {
ValueType vt = (bestValue <= oldAlpha ? VALUE_TYPE_UPPER : bestValue >= beta ? VALUE_TYPE_LOWER : VALUE_TYPE_EXACT); ValueType vt = (bestValue <= oldAlpha ? VALUE_TYPE_UPPER : bestValue >= beta ? VALUE_TYPE_LOWER : VALUE_TYPE_EXACT);
TT.store(pos.get_key(), value_to_tt(bestValue, ply), vt, d, ss->bestMove, ss->eval, evalMargin); TT.store(pos.get_key(), value_to_tt(bestValue, ply), vt, d, ss->bestMove, ss->eval, evalMargin);
// Update killers only for checking moves that fails high
if ( bestValue >= beta
&& !pos.move_is_capture_or_promotion(ss->bestMove))
update_killers(ss->bestMove, ss);
assert(bestValue > -VALUE_INFINITE && bestValue < VALUE_INFINITE); assert(bestValue > -VALUE_INFINITE && bestValue < VALUE_INFINITE);
return bestValue; return bestValue;